IP Library Granted Patent US 12676365
Granted Patent B2
US 12676365 · App. 18/174,991 · Granted Jul 7, 2026

Short circuit based puncture detection for BEV protection plates

Inventors: David R. Eilken (Ann Arbor, MI); Taesoo Kim (Ann Arbor, MI); Jason Cremer (Stockbridge, MI)
Assignees: TOYOTA MOTOR ENGINEERING & MANUFACTURING NORTH AMERICA, INC.; TOYOTA JIDOSHA KABUSHIKI KAISHA
H01M50/14G01R31/52H01M10/4257H01M10/625H01M2220/20
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Quick Facts
Patent No.
US 12676365
App. No.
18/174,991
Granted
Jul 7, 2026
Kind
B2
Abstract

Method and systems for determining a battery electric vehicle (BEV) protection plate has been damaged. A BEV protection plate includes a circuit. The circuit includes a plurality of conductive tabs. The BEV protection is separated from a battery housing by an opening. The conductive tabs extend from the circuit disposed on the BEV protection plate into the opening. A diagnostic device measures a voltage of the battery housing. A controller is in communication with the diagnostic device, determines a short circuit based on the measured voltage of the battery housing; and outputs to a display a notification that the BEV protection plate is compromised.

Claims (62)

1 . A method comprising:

receiving an indication of a force being applied to a battery electric vehicle (BEV) protection plate,

wherein the indication of the force being applied comprises at least one conductive tab of a circuit of the BEV protection plate contacting a battery housing; and

wherein the circuit is disposed on the BEV protection plate;

measuring, using a diagnostic device, a voltage of the battery housing, wherein the battery housing is conductive; and

determining, using a controller, a short circuit when the measured voltage passes a threshold value.

2 . The method of claim 1 , further comprising:

determining, using a controller, the BEV protection plate has been compromised.

3 . The method of claim 2 , wherein determining the BEV protection plate has been compromised comprises determining the BEV protection plate has been punctured.

4 . The method of claim 1 , further comprises:

output, to a display using the controller, a notification that the BEV protection plate has been compromised.

5 . The method of claim 4 , wherein the notification is a visual indication that the BEV protection plate has been compromised.

6 . The method of claim 1 ,

wherein one conductive tab of the at least one conductive tab comprises a first height;

wherein the first height extends from the circuit on the BEV protection plate into an opening between the BEV protection plate and the battery housing; and

wherein the opening has a second height.

7 . The method of claim 6 , wherein prior to receiving the indication of the force being applied, the first height is less than the second height.

8 . The method of claim 7 , wherein after receiving the indication of the force being applied, the first height is equal to or greater than the second height.

9 . The method of claim 1 , further comprises:

measuring, using a diagnostic device, a voltage of the circuit.

10 . The method of claim 9 , wherein determining a short circuit comprises comparing the measured voltage of the battery housing to the measured voltage of the circuit.

11 . A system comprising:

a battery housing; and

a battery electric vehicle (BEV) protection plate,

wherein the battery housing is spaced apart from the BEV protection plate by an opening;

wherein the BEV protection plate comprises a circuit;

wherein the circuit comprises a plurality of conductive tabs; and

wherein the plurality of conductive tabs extend from the circuit disposed on the BEV protection plate into the opening.

12 . The system of claim 11 , wherein the plurality of conductive tabs comprise at least one shape of the one or more shapes:

spiral;

spring;

concave up; or

concave down.

13 . The system of claim 11 ,

wherein the circuit comprises a conductive sheet; and

wherein the plurality of conductive tabs are formed in the conductive sheet by stamping.

14 . The system of claim 11 , further comprising:

a diagnostic device, wherein the diagnostic device is configured to measure a voltage of the battery housing; and

a controller, wherein the controller is configured to determine a short circuit based on the measured voltage.

15 . The system of claim 11 , further comprising:

one or more support beams, wherein the one or more support beams couple the battery housing to the BEV protection plate.

16 . The system of claim 11 , further comprising:

a first support beam; and

a second support beam,

wherein the first support beam and the second support beam couple the battery housing to the BEV protection plate; and

wherein a portion of the BEV protection plate extends between the first support beam and the second support beam.

17 . The system of claim 16 , wherein the portion of the BEV protection plate that extends between the first support beam and the second support beam comprises the conductive tabs.

18 . A system comprising:

a battery housing;

a battery electric vehicle (BEV) protection plate,

wherein the BEV protection plate comprises a circuit;

wherein the circuit comprises a plurality of conductive tabs;

wherein the BEV protection plate is spaced apart from the battery housing by an opening;

wherein the conductive tabs extend from the circuit disposed on the BEV protection plate into the opening;

a diagnostic device, wherein the diagnostic device is configured to measure a voltage of the battery housing; and

a controller in communication with the diagnostic device;

wherein the controller is configured to:

determine a short circuit based on the measured voltage of the battery housing; and

output to a display a notification that the BEV protection plate is compromised.

19 . The system of claim 18 , further comprising:

the display.

20 . The system of claim 18 , wherein at least one conductive tab of the plurality of conductive tabs contacts the battery housing when a force is applied to an area of the BEV protection plate such that a height of the opening is reduced at the area.